strange freezing problem with vobsub

[Monolitus]

hi there,

whenever i run a divx title with subs using vobsub, every 15-60 seconds the picture freezes for 2 seconds and then just FF ....

this happens both in WMP and in BSPlayer.

with vobsub turned off (or no subs at all) this does not occur.

I also used the BSPlayer "native" subs and it works great ...

what is the problem ????

Cheers.

Mono.